US20140325974A1 - Hydraulic hybrid system for rotatory applications - Google Patents
Hydraulic hybrid system for rotatory applications Download PDFInfo
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- US20140325974A1 US20140325974A1 US13/261,913 US201213261913A US2014325974A1 US 20140325974 A1 US20140325974 A1 US 20140325974A1 US 201213261913 A US201213261913 A US 201213261913A US 2014325974 A1 US2014325974 A1 US 2014325974A1
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- accumulator
- piston
- pressure
- hydraulic
- actuator
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- 239000012530 fluid Substances 0.000 claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 16
- 230000013011 mating Effects 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004148 unit process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 20
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
- B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/205—Accumulator cushioning means using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/40—Constructional details of accumulators not otherwise provided for
- F15B2201/41—Liquid ports
- F15B2201/413—Liquid ports having multiple liquid ports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/50—Monitoring, detection and testing means for accumulators
- F15B2201/51—Pressure detection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20569—Type of pump capable of working as pump and motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/633—Electronic controllers using input signals representing a state of the prime mover, e.g. torque or rotational speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Definitions
- FIG. 3 the piston accumulator in conjunction with a hydraulic circuit diagram of an embodiment of the hybrid system according to the invention depicted by schematic symbols.
- a valve group which can be actuated by the control logic unit 53 , is located in each of the connecting lines, which valve groups are symbolically designated as v 1 , v 2 , etc., wherein each valve group is formed by two fast switching 2/2-way-valves, which are designated as 79 and 81 , and which are identified with indices 1 to 4 for the valve groups v 1 to v 4 .
- Each of the connecting lines 73 , 75 , 77 , 80 can be connected or blocked from the associated fluid ports 41 , 43 , 45 or 47 respectively of the piston accumulator 1 by means of the directional valves 81 . 1 to 81 . 4 .
- the respective connecting lines can be connected to the tank 83 by means of the directional valves 79 . 1 to 79 . 4 .
- An inverse shuttle valve 99 is provided in order to discharge the excess amount of fluid in the circuit coming from the accumulator 1 during the discharging processes, from the now unpressurized downstream side of the motor pump unit 91 to the tank 83 .
- the upstream side of the motor pump unit 91 can be connected to the tank 83 by means of this shuttle valve for the refilling operations during charging processes.
- the motor pump unit 91 has a fixed displacement pump.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Fluid-Pressure Circuits (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
Description
- The invention relates to a hydraulic hybrid system for rotary applications, having an actuator in the form of a motor pump unit, which is coupled with a rotary-operating device, for example a traction drive, and which works as a consumer of hydraulic energy in one operating state of the device and as a producer of hydraulic energy in another operating state of the device, whereby said hydraulic hybrid system has a hydraulic accumulator, which can be charged by the motor pump unit for energy storage in the one operating state, and which can be discharged for energy release to the motor pump unit in the other operating state.
- Given the increasing scarcity of resources and the increased efforts to save energy associated therewith, hybrid systems of the type described above are becoming increasingly important. In such systems, a motor pump unit is disposed between a drive motor, for example in the form of an internal combustion engine or electric motor, and a rotary device, for example a traction drive, which motor pump unit is operated in the system in a semi-closed hydraulic circuit, which, in combination with a hydraulic accumulator serving as an energy store, forms a hybrid system that makes energy conservation possible. In the manner common in such hybrid systems, in the case of operating states in which the primary drive in the form of the internal combustion engine or electric motor is able to provide an excess of power as compared to the actuator, for example in the case of the braking processes of a traction drive (regenerative braking), the hydraulic accumulator for energy storage will be charged by means of the motor pump unit. In the case of operating states in which increased efficiency is required at the actuator, for example for the acceleration processes of a traction drive, energy stored in the hydraulic accumulator is returned to the system in a discharging process for a power surge.
- In the relevant hybrid systems of this kind from the prior art, the efficiency of the energy conversion leaves something to be desired. One reason for this is the dependency of the charging and discharging processes of the hydraulic accumulator on the respective system pressure. More specifically, the hydraulic accumulator can only be charged when the system pressure is greater than the gas pressure present in the accumulator on the gas side. If this system pressure cannot be established in the respective operating situation of the device, such as the traction drive, it will not be possible to accumulate energy in the accumulator. The discharging process of the accumulator is also subject to the limitation that energy from the accumulator can only be fed back into the system when the accumulator pressure is greater than the current system pressure. There is an additional problem in the fact that, in the case of an accumulator pressure that is greater than the current, needed system pressure, it is necessary to balance the pressure level of the accumulator and the system by means of valves. Thus the energy, which is latent in the differential pressure between the accumulator pressure and the system pressure, is lost as a result of throttling losses. Attempts to mitigate these problems by using a variable displacement pump for the motor pump unit leads, on the one hand, to operating behavior that is inadequate, and to a significant expense for the costly variable displacement pump on the other hand.
- A hydraulic energy storage system is known in the prior art from DE 601 18 987 T2. The fluid outlets of a pump-motor unit are coupled to a high-pressure chamber and a low-pressure chamber of a double piston accumulator, wherein the pistons in the individual chambers of the double piston accumulator are connected to one another by means of a piston rod. The known energy storage system is particularly suitable for use in vehicles, in order to be able to store energy at high power levels, and to be able to release energy again. In terms of advantageous energy conversion however, the known solution leaves something to be desired.
- In view of this prior art, the object of the invention is to provide a hybrid system of the type under consideration, which allows a more advantageous energy conversion than with the known solutions.
- This object is achieved according to the invention by a hybrid system, which has the features of claim 1 in its entirety.
- Accordingly, a substantial feature of the invention is that at least one hydraulic accumulator is provided, which provides an adjustment option, whereby said accumulator provides a plurality of pressure chambers, which are adjacent to active surfaces of different sizes on the fluid side of the accumulator piston, wherein an adjustment assembly is provided, which connects a selected pressure chamber or a plurality of selected pressure chambers of the piston accumulator to the actuator, depending on the respective prevailing pressure level on the gas side of the piston accumulator and at the actuator. This provides the possibility of recycling energy regardless of the pre-charge pressure on the gas side of the accumulator and independent of the respective system pressure that corresponds to the current operating state of the actuator system pressure,
- because the respective desired pressure level at the accumulator can be used for charging or discharging by selecting an active surface of the appropriate size. An optimal energy conversion is thereby possible for all operating states.
- In an especially advantageous manner, a control logic unit may be associated with the adjustment assembly, which logic unit processes the signals from sensor devices for the control of the valves associated with the adjustment assembly, said sensor devices displaying the pressure level on the gas side of the piston accumulator and the respective operating state of the actuator. The logic unit thereby controls the energy transformation by deciding how the accumulator should be charged or discharged based on the system pressure, e.g. the operating state of the actuator, and the state of charge at the accumulator. In so doing, it is possible for the user to influence the logic unit by entering his own presets, and thereby determine the load characteristic of the hybrid system.
- With regard to the construction of the piston accumulator, the configuration may be advantageously made such that the accumulator piston is configured as a step piston for the formation of active surfaces of different sizes, and that said piston has partial piston surfaces that are adjacent to cylinder surfaces on the fluid side thereof, wherein the accumulator housing has corresponding mating surfaces that are adjacent to cylinder surfaces, which mating surfaces, together with partial piston surfaces associated therewith, each delimit separate pressure chambers.
- Active surfaces on the accumulator piston and mating surfaces on the accumulator housing are preferably disposed at an axial spacing from one another, and the active surfaces and mating surfaces may be provided in the form of annular surfaces or circular surfaces, which are disposed concentrically to the longitudinal axis.
- In terms of controlling the pressure chambers of the piston accumulator, the configuration may be advantageously made such that the adjustment assembly has selector valves, by means of which the respective pressure chambers of the piston accumulator, which are selected for charging or discharging, can be connected to the actuator, and the remaining pressure chambers can be connected to the tank. Controlled by the control logic unit, a selected pressure chamber or a combination of selected pressure chambers can be connected to the actuator for charging or discharging, while non-selected pressure chambers can be emptied without pressure to the tank during the discharging of the active pressure chamber, and refilled from the tank during the charging of the active pressure chambers. Selecting the active pressure chambers provides the opportunity to efficiently charge the accumulator precisely with the currently available system pressure. Even small amounts of pressure are sufficient. When discharging the accumulator, the surface combination is selected that converts the gas pressure into a hydraulic pressure, which is only slightly above the needed system pressure, thereby enabling an extremely efficient discharge of the accumulator.
- In the case of the selector valves for the control of the pressure chambers of the accumulator, these may be digital fast-switching valves. In the case of changes in the accumulator pressure or the system pressure, the surface combination may be changed during the charging processes or discharging processes. The sensor devices, which supply the signals that are to be processed by the control logic unit, may have pressure sensors, which display the filling pressure on the gas side of the piston accumulator and the system pressure at the actuator, and may have a speed sensor, which indicates the rotational speed at the motor pump unit.
- The invention is explained in detail below based on the drawings.
- Shown are:
-
FIG. 1 a highly schematic, simplified longitudinal section of an embodiment of a hydropneumatic piston accumulator in a multi-stage design for use in the system according to the invention; -
FIG. 2 a schematic diagram that shows the piston accumulator fromFIG. 1 in conjunction with associated system components of the system according to the invention, and -
FIG. 3 the piston accumulator in conjunction with a hydraulic circuit diagram of an embodiment of the hybrid system according to the invention depicted by schematic symbols. - The hydropneumatic piston accumulator 1, which is shown in a schematic, simplified depiction in
FIG. 1 , has anaccumulator piston 5 that is axially movably guided in anaccumulator housing 3, which accumulator piston separates a gas side 7, on which afilling port 9 is located, from fluid-side pressure chambers in theaccumulator housing 3. Theaccumulator piston 5 is designed in the manner of a step piston such that, in combination with corresponding stepped portions of theaccumulator housing 3, said accumulator piston delimits fluid-side pressure chambers accumulator piston 5.FIG. 1 designates theseactive surfaces active surfaces active surface 17 in the form of a circular surface.Pressure chambers active surfaces mating surfaces accumulator housing 3, as well as bycylinder surfaces 35 of thecylinder housing 3 andcylinder surfaces 37 on theaccumulator piston 5. Thepressure chamber 25 adjacent to theactive surfaces 17 is delimited by a mating surface 33 of theaccumulator housing 3 as well as acylinder surface 39 of theaccumulator piston 5. - A
fluid port pressure chamber active surfaces accumulator piston 5, the associatedmating surfaces accumulator housing 3 in steps that are axially spaced relative to one another. -
FIG. 2 shows the piston accumulator 1 in conjunction with associated system components, wherein anactuator 49 is operatively connected to anadjustment assembly 51. Theactuator 49 has a motor pump unit 91 (FIG. 3 ), which is coupled with a device 94 (FIG. 3 ). Acontrol logic unit 53 is associated with theadjustment assembly 51, which logic unit actuates avalve arrangement 57 of theadjustment assembly 51 by means of a control andregulation unit 55. As will be explained in greater detail on the basis ofFIG. 3 , thevalve arrangement 57 has selector valve, which produces selected fluid connections between theactuator 49 and thefluid ports pressure chambers control logic unit 53 processes signals, which are provided by sensor devices and which represent the operating states ofactuator 49 and piston accumulator 1. Only one of the sensor devices, apressure sensor 59 at thefilling port 9 of the piston accumulator 1, is shown inFIG. 2 . -
FIG. 3 shows the hydraulic circuit diagram of an embodiment of the hydraulic hybrid system, according to the invention, wherein theactuator 49 has amotor pump unit 91, thepump shaft 92 of which is coupled to a drive source on one side, for example aninternal combustion engine 93, and is coupled to a rotary drivendevice 94 on the other side. This device may be working hydraulics, a traction drive or the like, i.e. it may be a device, which works as a consumer of hydraulic energy in one operating state, and as a producer of hydraulic energy in other operating states, for example in the case of braking processes of the traction drive, wherein a corresponding torque is generated at thepump shaft 92. The pressure side of themotor pump unit 91 is connected, by means of acheck valve 95, to amain line 71 of theadjustment assembly 91 that guides the system pressure. These adjustment assemblies each have aconnection line main line 71 and each of thefluid ports control logic unit 53, is located in each of the connecting lines, which valve groups are symbolically designated as v1, v2, etc., wherein each valve group is formed by two fast switching 2/2-way-valves, which are designated as 79 and 81, and which are identified with indices 1 to 4 for the valve groups v1 to v4. Each of theconnecting lines fluid ports tank 83 by means of the directional valves 79.1 to 79.4. - A
pressure sensor 59 that detects the gas side pressure is provided at thefilling port 9 of the piston accumulator 1, apressure sensor 63 that detects the system pressure is provided at themain line 71, and aspeed sensor 96 is provided at thedrive motor 93 in order to generate the signals that are to be processed by thecontrol logic unit 53. Thecontrol logic unit 53 decides, on the basis of these signals, which of the connectinglines main line 71 and the respective associatedfluid ports pressure chambers selector valve 97 to the suction side of themotor pump unit 91 from themain line 71, which is secured by means of apressure relief valve 86. For charging processes, theselector valve 97 is closed, and one connecting line or a plurality of the connectinglines tank 83 for the respective non-activated connectinglines non-selected pressure chambers tank 83 in the case of charging processes. In the case of changing system conditions, the respective selected combination of theactive surfaces inverse shuttle valve 99 is provided in order to discharge the excess amount of fluid in the circuit coming from the accumulator 1 during the discharging processes, from the now unpressurized downstream side of themotor pump unit 91 to thetank 83. The upstream side of themotor pump unit 91 can be connected to thetank 83 by means of this shuttle valve for the refilling operations during charging processes. Themotor pump unit 91 has a fixed displacement pump.
Claims (7)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011120227A DE102011120227B4 (en) | 2011-12-03 | 2011-12-03 | Hydraulic hybrid system for rotary applications |
DE102011120227 | 2011-12-03 | ||
DE102011120227.0 | 2011-12-03 | ||
PCT/EP2012/004655 WO2013079152A1 (en) | 2011-12-03 | 2012-11-09 | Hydraulic hybrid system for rotatory applications |
Publications (2)
Publication Number | Publication Date |
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US20140325974A1 true US20140325974A1 (en) | 2014-11-06 |
US10781833B2 US10781833B2 (en) | 2020-09-22 |
Family
ID=47221294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/261,913 Active 2036-02-11 US10781833B2 (en) | 2011-12-03 | 2012-11-09 | Hydraulic hybrid system for rotatory applications |
Country Status (4)
Country | Link |
---|---|
US (1) | US10781833B2 (en) |
EP (1) | EP2786024B1 (en) |
DE (1) | DE102011120227B4 (en) |
WO (1) | WO2013079152A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2577393A (en) * | 2018-08-17 | 2020-03-25 | Cameron Tech Ltd | Accumulator system |
CN111022439A (en) * | 2019-12-13 | 2020-04-17 | 三一重机有限公司 | Reverse rotation preventing method and device for slewing brake and engineering machinery |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3945207A (en) * | 1974-07-05 | 1976-03-23 | James Ervin Hyatt | Hydraulic propulsion system |
US4760697A (en) * | 1986-08-13 | 1988-08-02 | National Research Council Of Canada | Mechanical power regeneration system |
US7100723B2 (en) * | 2004-02-01 | 2006-09-05 | Ford Global Technologies, Llc | Multiple pressure mode operation for hydraulic hybrid vehicle powertrain |
US8959905B2 (en) * | 2008-12-23 | 2015-02-24 | Hydac Technology Gmbh | Hydrostatic drive system |
US9631647B2 (en) * | 2011-12-03 | 2017-04-25 | Hydac Fluidtechnik Gmbh | System for improving the energy efficiency in hydraulic systems, piston accumulator and pressure accumulator provided for such a system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4212542A1 (en) * | 1992-04-15 | 1993-10-21 | Kurt Huber | Braking energy recycling system for wheeled vehicle, train, electric motor - has motor-pump unit to accept pressurised oil from reservoir during acceleration and deliver it during braking |
US6145311A (en) * | 1995-11-03 | 2000-11-14 | Cyphelly; Ivan | Pneumo-hydraulic converter for energy storage |
US5971027A (en) | 1996-07-01 | 1999-10-26 | Wisconsin Alumni Research Foundation | Accumulator for energy storage and delivery at multiple pressures |
DE60118987T2 (en) * | 2000-11-28 | 2007-01-11 | Shep Ltd., Douglas | HYDRAULIC ENERGY STORAGE SYSTEMS |
-
2011
- 2011-12-03 DE DE102011120227A patent/DE102011120227B4/en not_active Expired - Fee Related
-
2012
- 2012-11-09 EP EP12790419.1A patent/EP2786024B1/en active Active
- 2012-11-09 WO PCT/EP2012/004655 patent/WO2013079152A1/en active Application Filing
- 2012-11-09 US US13/261,913 patent/US10781833B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3945207A (en) * | 1974-07-05 | 1976-03-23 | James Ervin Hyatt | Hydraulic propulsion system |
US4760697A (en) * | 1986-08-13 | 1988-08-02 | National Research Council Of Canada | Mechanical power regeneration system |
US7100723B2 (en) * | 2004-02-01 | 2006-09-05 | Ford Global Technologies, Llc | Multiple pressure mode operation for hydraulic hybrid vehicle powertrain |
US8959905B2 (en) * | 2008-12-23 | 2015-02-24 | Hydac Technology Gmbh | Hydrostatic drive system |
US9631647B2 (en) * | 2011-12-03 | 2017-04-25 | Hydac Fluidtechnik Gmbh | System for improving the energy efficiency in hydraulic systems, piston accumulator and pressure accumulator provided for such a system |
Cited By (13)
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US11927203B2 (en) | 2016-12-21 | 2024-03-12 | A&A International, Llc | Renewable energy and waste heat harvesting system |
US11473597B2 (en) * | 2016-12-21 | 2022-10-18 | A & A International, Llc | Renewable energy and waste heat harvesting system |
US11624254B2 (en) | 2018-08-17 | 2023-04-11 | Schlumberger Technology Corporation | Accumulator system |
US11795978B2 (en) | 2018-08-17 | 2023-10-24 | Schlumberger Technology Corporation | Accumulator system |
GB2577393A (en) * | 2018-08-17 | 2020-03-25 | Cameron Tech Ltd | Accumulator system |
GB2577393B (en) * | 2018-08-17 | 2021-03-17 | Cameron Tech Ltd | Accumulator |
US11441579B2 (en) | 2018-08-17 | 2022-09-13 | Schlumberger Technology Corporation | Accumulator system |
CN111022439A (en) * | 2019-12-13 | 2020-04-17 | 三一重机有限公司 | Reverse rotation preventing method and device for slewing brake and engineering machinery |
US20230184324A1 (en) * | 2020-06-25 | 2023-06-15 | Deere & Company | Systems and methods for pressurizing transmission charge oil |
US11867285B2 (en) * | 2020-06-25 | 2024-01-09 | Deere & Company | Systems and methods for pressurizing transmission charge oil |
CN111963333A (en) * | 2020-09-18 | 2020-11-20 | 徐州工业职业技术学院 | Energy accumulator and energy-saving system utilizing waste heat of engine tail gas |
CN112324723A (en) * | 2020-10-30 | 2021-02-05 | 杰锋汽车动力***股份有限公司 | Bellows energy storage ware |
CN112412895A (en) * | 2020-12-04 | 2021-02-26 | 潍柴动力股份有限公司 | Hydraulic system exhaust control method and device |
Also Published As
Publication number | Publication date |
---|---|
WO2013079152A1 (en) | 2013-06-06 |
EP2786024B1 (en) | 2015-10-07 |
DE102011120227B4 (en) | 2013-08-14 |
DE102011120227A1 (en) | 2013-06-06 |
US10781833B2 (en) | 2020-09-22 |
EP2786024A1 (en) | 2014-10-08 |
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